____between people of different countries. The super star Jay Chou has cooperated with the American NBA star Kobe Bryant to create a song named The Heaven and Earth Challenge.____ It expresses the love for basketball.____ Jay Chou has learned much from Kobe's sports spirit. In the song,____ People can download the ring tone(铃声) of the song from the Internet.____ which aims to improve educational environment in poor areas in China

A. And it encourages young people to be more confident.

B. Music touches our hearts and shortens(缩短) the distance

C. Jay Chou does most of the singing part while Kobe plays a part of a rapper(说唱者).

D. All the money from the downloads will go to Project Hope.

E. That's a song written by Jay Chou whose favorite sport is basketball.

环己醇和环己酮的部分物理性质见下表：

现以20 mL环己醇与足量Na₂Cr₂O₇和硫酸的混合液充分反应，制得主要含环己酮和水的粗产品，然后进行分离提纯。

分离提纯过程中涉及到的主要步骤如下：

a．往液体中加入NaCl固体至饱和，静置，分液；

b.水层用乙醚（乙醚沸点34.6℃，易燃烧）萃取，萃取液并入有机层；

c.加入无水MgSO₄固体，除去有机物中少量水。

d.过滤；

e．蒸馏，除去乙醚后，收集151℃～156℃馏分；

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